120 lines
4.1 KiB
C
120 lines
4.1 KiB
C
/* Copyright (C) 2008-2016 Free Software Foundation, Inc.
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This file is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your option)
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any later version.
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This file is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <spu_intrinsics.h>
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typedef int TItype __attribute__ ((mode (TI)));
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union qword_TItype
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{
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qword q;
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TItype t;
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};
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inline static qword
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si_from_TItype (TItype t)
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{
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union qword_TItype u;
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u.t = t;
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return u.q;
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}
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inline static TItype
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si_to_TItype (qword q)
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{
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union qword_TItype u;
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u.q = q;
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return u.t;
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}
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/* A straight forward vectorization and unrolling of
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* short l[8], r[8];
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* TItype total = 0;
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* for (i = 0; i < 8; i++)
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* for (j = 0; j < 8; j++)
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* total += (TItype)((l[7-i] * r[7-j]) << (16 * (i + j)));
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*/
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TItype
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__multi3 (TItype l, TItype r)
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{
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qword u = si_from_TItype (l);
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qword v = si_from_TItype (r);
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qword splat0 = si_shufb (v, v, si_ilh (0x0001));
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qword splat1 = si_shufb (v, v, si_ilh (0x0203));
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qword splat2 = si_shufb (v, v, si_ilh (0x0405));
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qword splat3 = si_shufb (v, v, si_ilh (0x0607));
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qword splat4 = si_shufb (v, v, si_ilh (0x0809));
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qword splat5 = si_shufb (v, v, si_ilh (0x0a0b));
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qword splat6 = si_shufb (v, v, si_ilh (0x0c0d));
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qword splat7 = si_shufb (v, v, si_ilh (0x0e0f));
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qword part0l = si_shlqbyi (si_mpyu (u, splat0), 14);
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qword part1h = si_shlqbyi (si_mpyhhu (u, splat1), 14);
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qword part1l = si_shlqbyi (si_mpyu (u, splat1), 12);
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qword part2h = si_shlqbyi (si_mpyhhu (u, splat2), 12);
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qword part2l = si_shlqbyi (si_mpyu (u, splat2), 10);
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qword part3h = si_shlqbyi (si_mpyhhu (u, splat3), 10);
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qword part3l = si_shlqbyi (si_mpyu (u, splat3), 8);
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qword part4h = si_shlqbyi (si_mpyhhu (u, splat4), 8);
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qword part4l = si_shlqbyi (si_mpyu (u, splat4), 6);
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qword part5h = si_shlqbyi (si_mpyhhu (u, splat5), 6);
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qword part5l = si_shlqbyi (si_mpyu (u, splat5), 4);
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qword part6h = si_shlqbyi (si_mpyhhu (u, splat6), 4);
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qword part6l = si_shlqbyi (si_mpyu (u, splat6), 2);
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qword part7h = si_shlqbyi (si_mpyhhu (u, splat7), 2);
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qword part7l = si_mpyu (u, splat7);
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qword carry, total0, total1, total2, total3, total4;
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qword total5, total6, total7, total8, total9, total10;
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qword total;
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total0 = si_a (si_a (si_a (part0l, part1h), si_a (part1l, part2h)), part7l);
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total1 = si_a (part2l, part3h);
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total2 = si_a (part3l, part4h);
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total3 = si_a (part4l, part5h);
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total4 = si_a (part5l, part6h);
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total5 = si_a (part6l, part7h);
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total6 = si_a (total0, total1);
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total7 = si_a (total2, total3);
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total8 = si_a (total4, total5);
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total9 = si_a (total6, total7);
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total10 = si_a (total8, total9);
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carry = si_cg (part2l, part3h);
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carry = si_a (carry, si_cg (part3l, part4h));
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carry = si_a (carry, si_cg (part4l, part5h));
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carry = si_a (carry, si_cg (part5l, part6h));
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carry = si_a (carry, si_cg (part6l, part7h));
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carry = si_a (carry, si_cg (total0, total1));
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carry = si_a (carry, si_cg (total2, total3));
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carry = si_a (carry, si_cg (total4, total5));
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carry = si_a (carry, si_cg (total6, total7));
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carry = si_a (carry, si_cg (total8, total9));
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carry = si_shlqbyi (carry, 4);
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total = si_cg (total10, carry);
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total = si_shlqbyi (total, 4);
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total = si_cgx (total10, carry, total);
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total = si_shlqbyi (total, 4);
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total = si_addx (total10, carry, total);
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return si_to_TItype (total);
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}
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